#### Installation de kubectl

```bash
sudo apt-get update && sudo apt-get install -y apt-transport-https ca-certificates curl gnupg
sudo mkdir -p -m 755 /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
sudo chmod 644 /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.33/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo chmod 644 /etc/apt/sources.list.d/kubernetes.list
sudo apt-get update
sudo apt-get install -y kubectl
```

#### Installation de k3sup :

```bash
# Avec curl
curl -sLS https://get.k3sup.dev | sh
sudo install k3sup /usr/local/bin/

# Ou téléchargement direct depuis GitHub
wget https://github.com/alexellis/k3sup/releases/download/0.13.11/k3sup
chmod +x k3sup
sudo mv k3sup /usr/local/bin/
```

#### Configuration sudo sans mot de passe :

```bash
# Ajout de l'utilisateur au groupe sudo
sudo usermod -aG sudo pleb

# Configuration pour éviter la saisie de mot de passe
echo "pleb ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/pleb
```

#### Premier déploiement :

```bash
# Installation du master node
k3sup install --ip 192.168.1.14 --user pleb --ssh-key $HOME/.ssh/bikiniBottom

# Ajout des worker nodes
k3sup join --ip 192.168.1.13 --server-ip 192.168.1.14 --user pleb --ssh-key $HOME/.ssh/bikiniBottom
k3sup join --ip 192.168.1.16 --server-ip 192.168.1.14 --user pleb --ssh-key $HOME/.ssh/bikiniBottom
# k3sup join --ip 192.168.1.19 --server-ip 192.168.1.14 --user pleb --ssh-key $HOME/.ssh/bikiniBottom
```

#### Vérification du cluster :

```bash
# Export du kubeconfig
export KUBECONFIG=/home/julien/kubernetes/kubeconfig

# Vérification des nœuds
kubectl get nodes -o wide

# Check des pods système
kubectl get pods -n kube-system
```

#### Validation :

```bash
kubectl get nodes

NAME      STATUS   ROLES           AGE   VERSION
gary      Ready    <none>          77s   v1.34.4+k3s1
sandy     Ready    control-plane   39m   v1.34.4+k3s1
sheldon   Ready    <none>          48s   v1.34.4+k3s1
```


### Helm

> On sandy

```bash
curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
chmod 700 get_helm.sh
./get_helm.sh
helm version
```

#### [Headlamp](https://headlamp.dev/docs/latest/)

```bash
# first add our custom repo to your local helm repositories
helm repo add headlamp https://kubernetes-sigs.github.io/headlamp/

# now you should be able to install headlamp via helm
helm install bb-headlamp headlamp/headlamp --namespace kube-system
```

```
NAME: bb-headlamp
LAST DEPLOYED: Tue Feb 17 17:17:03 2026
NAMESPACE: kube-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
```

1. Get the application URL by running these commands:
```bash
export POD_NAME=$(kubectl get pods --namespace kube-system -l "app.kubernetes.io/name=headlamp,app.kubernetes.io/instance=bb-headlamp" -o jsonpath="{.items[0].metadata.name}")
export CONTAINER_PORT=$(kubectl get pod --namespace kube-system $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
echo "Visit http://127.0.0.1:8080 to use your application"
kubectl --namespace kube-system port-forward $POD_NAME 8080:$CONTAINER_PORT
```

2. Get the token using
```bash
kubectl create token bb-headlamp --namespace kube-system
```

#### [longhorn](https://longhorn.io)

```bash
USER=admin; PASSWORD=v5bB4OQRDfY5tFJ1; echo "${USER}:$(openssl passwd -stdin -apr1 <<< ${PASSWORD})" >> auth

sudo k3s kubectl -n longhorn-system create secret generic basic-auth --from-file=auth

vim longhorn-ingress.yml
```

```
---
apiVersion: v1
kind: Secret
metadata:
  name: longhorn-basic-auth-secret
  namespace: longhorn-system
data:
  users: |2
    YWRtaW46JGFwcjEkMmp5TzMwYmskRE5IV0VEQW1VQXFVajVGOHNvdXNVMAoK

---
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: longhorn-basic-auth-middleware
spec:
  basicAuth:
    secret: longhorn-basic-auth-secret
    realm: "Longhorn Dashboard"

---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: longhorn-ingress
  namespace: longhorn-system
  annotations:
    spec.ingressClassName: traefik
    traefik.ingress.kubernetes.io/router.middlewares: longhorn-system-longhorn-basic-auth-middleware@kubernetescrd
spec:
  rules:
  - http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: longhorn-frontend
            port:
              number: 80
```

```bash
sudo k3s kubectl -n longhorn-system apply -f longhorn-ingress.yml
```

#### traefik

```bash
vim traefik-ingress.yml
```

```
---
apiVersion: v1
kind: Secret
metadata:
  name: traefik-basic-auth-secret
  namespace: kube-system
data:
  users: |2
    YWRtaW46JGFwcjEkMmp5TzMwYmskRE5IV0VEQW1VQXFVajVGOHNvdXNVMAoK

---
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: traefik-basic-auth-middleware
spec:
  basicAuth:
    secret: traefik-basic-auth-secret
    realm: "Traefik Dashboard"

---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: traefik-ingress
  namespace: kube-system
  annotations:
    spec.ingressClassName: traefik
    traefik.ingress.kubernetes.io/router.middlewares: kube-system-traefik-basic-auth-middleware@kubernetescrd
spec:
  rules:
  - host: trfk.delmar.bzh
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: traefik-dashboard
            port:
              number: 9000

---


---
apiVersion: traefik.io/v1alpha1
kind: IngressRoute
metadata:
  name: dashboard
spec:
  entryPoints:
    - web 
    - websecure
  routes:
    - match: Host(`trfk.delmar.bzh`)
      kind: Rule
      services:
        - name: api@internal
          kind: TraefikService
      middlewares:
        - name: traefik-basic-auth-middleware
  tls:
    secretName: traefik-tls
certificatesResolvers:
  caServer: "https://acme-staging-v02.api.letsencrypt.org/directory"
  myresolver:
    acme:
      email: admin@delmar.bzh
      storage: "/letsencrypt/acme.json"
      dnsChallenge:
        provider: ovh
        delayBeforeCheck: 0
```

```bash
sudo k3s kubectl -n kube-system apply -f traefik-ingress.yml
```